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In gas chromatography, the Kovats retention index (shorter Kovats index, retention index; plural retention indices) is used to convert retention times into system-independent constants. The index is named after the Hungarian-born Swiss chemist Ervin Kováts , who outlined the concept in the 1950s while performing research into the composition ...
The most common use of this data representation is when mass spectrometry is used in conjunction with some form of chromatography, such as in liquid chromatography–mass spectrometry or gas chromatography–mass spectrometry. In this case, the x-axis represents retention time, analogous to any other chromatogram.
Schemes for data retention do not make provisions for adequate regulation of the data retention process and for independent judicial oversight. [citation needed] Data retention is an invasion of privacy and a disproportionate response to the threat of terrorism. [citation needed] It is easy for terrorists to avoid having their communications ...
To calculate resolution, the retention time and curve width are required. Retention time is the time from the start of signal detection by the detector to the peak height of the elution concentration profile of each different sample. Curve width is the width of the concentration profile curve of the different samples in the chromatogram in ...
The mass spectrometry process normally requires a very pure sample while gas chromatography using a traditional detector (e.g. Flame ionization detector) cannot differentiate between multiple molecules that happen to take the same amount of time to travel through the column (i.e. have the same retention time), which results in two or more ...
A couple in Australia have been accused of faking their young son's cancer diagnosis "It will be alleged that the accused shaved their 6-year-old child’s head, eyebrows, placed him in a ...
Example chromatogram showing signal as a function of retention time. In chromatography, resolution is a measure of the separation of two peaks of different retention time t in a chromatogram. [1] [2] [3] [4]
Prince Andrew is at the center of more controversy.. The Duke of York, 64, who is King Charles' brother, reportedly had close business links with a Chinese national, who is alleged to be a spy ...